What is the secret of healing when it comes to the human soul? In the figure of the psychotherapist, in the correctly selected technique or medicine, in the desire of the patient himself? Where is the line between medicine and philosophy in these complex issues? This book is the main scientific work of Viktor Frankl, the first version of which he wrote before his deportation to a concentration camp. Exploring conceptual and empirical approaches in psychiatry, Frankl complements the understanding of the soul with the concept of spirit as the core of personality, which remains intact in any illness, shows the role of existential analysis in the treatment of mental disorders - from neuroses and depression to schizophrenic psychoses. The patient turns to a psychiatrist, desperate in search of purpose and meaning in life. And in this search, Frankl sees the main aspiration and the most important task of a person; it is on this that he builds his method (logotherapy), which helps to understand, find, and return meaning - the meaning of life, suffering, work and love.